Hi @Harry28, I'm sorry to hear that.
We don't send out any pop up ads to your device so it does sound like you have installed a third party application that sends out these ads to your device.
If you restart your device in safe mode do you still see these ads? In safe mode all downloaded applications are temporarily inactivated and we can very easily see if any of them is the cause of this.
You can also take a screenshot of one of the ads and upload them here to the forum. To do that, press and hold the power button > tap "Take screenshot".
Let us know how it goes! 
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